... guarantee devliery 4.Ten years industry experience Rowing machine parts bearing :1.rowing machine parts bearing2.Precision: p0,p6,p5,p4, ... usually used in large electrical machine, machine tool principal axis, internal-combustion engine, generator, turbo machine, reducer, rolling machine, etc.Types of cylindrical roller ... 221 222 224 226 228 230 232 234 236 238 240 244 248 252 260NU/N/NF/NJ/RNU/NUP303 ...